why lithium carbonite is unstable?
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Lithium is an alkali metal. In case of the group 1 element the electropositive character increase as ‘we go down the period’. Hence sodium is more electropositive as compared to lithium.
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As we move down the alkali metal group, the electropositive character increases. This causes an increase in the stability of alkali carbonates. However, lithium carbonate is not so stable to heat. This is because lithium carbonate is covalent. Lithium ion, being very small in size, polarizes a large carbonate ion, leading to the formation of more stable lithium oxide.
As we move down the alkali metal group, the electropositive character increases. This causes an increase in the stability of alkali carbonates. However, lithium carbonate is not so stable to heat. This is because lithium carbonate is covalent. Lithium ion, being very small in size, polarizes a large carbonate ion, leading to the formation of more stable lithium oxide.Therefore, lithium carbonate decomposes at a low temperature while a stable sodium carbonate decomposes at a high temperature.
As we move down the alkali metal group, the electropositive character increases. This causes an increase in the stability of alkali carbonates. However, lithium carbonate is not so stable to heat. This is because lithium carbonate is covalent. Lithium ion, being very small in size, polarizes a large carbonate ion, leading to the formation of more stable lithium oxide.Therefore, lithium carbonate decomposes at a low temperature while a stable sodium carbonate decomposes at a high temperature.OR
As we move down the alkali metal group, the electropositive character increases. This causes an increase in the stability of alkali carbonates. However, lithium carbonate is not so stable to heat. This is because lithium carbonate is covalent. Lithium ion, being very small in size, polarizes a large carbonate ion, leading to the formation of more stable lithium oxide.Therefore, lithium carbonate decomposes at a low temperature while a stable sodium carbonate decomposes at a high temperature.ORThe smaller the size of the ion, the higher the lattice energy and the greater the extent of the polarization. Li+ has a smaller size compared to Na+, hence polarizes the CO3- ion at a greater extent compared to Na+. Li2CO3 therefore requires less energy to break while Na2CO3 needs a higher energy making it more stable than Li2CO3
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